It was a film that changed movies forever and now the Blair Witch Project is getting a reboot.

Formerly known as The Woods, the new film will be released in September and has been kept as a successful secret from nearly everyone but now the brand new trailer has been revealed.

At San Diego Comic Con the film makers revealed the trailer to audiences and shocked the film fan world.

Centred around the brother of the original film's Heather Donahue, he attempts to work out what happened to his sister and even find her in the woods where she went missing.

(Image: Youtube / Lionsgate)

(Image: Youtube / Lionsgate)

Played by James Allen McCune, James takes a group of his friends to the Black Hills Forest to discover what happened between his sister and the Blair Witch back in 1997.

“It really has been fascinating, all the CIA-level security that we have put around this project, from the very beginning,” Jason Constantine, President, Acquisitions and Co-Productions, Lionsgate Motion Picture Group told Entertainment Weekly.

“I’ve been at Lionsgate for 16 years, and I’ve had the privilege of working on a lot of movies that I love, and are a lot of fun: horror movies, and action movies, and Oscar movies.

(Image: Youtube / Lionsgate)

(Image: Rex)

"But never have we ever set out to make a reboot movie, and keep it in total secrecy, with a brand that’s as well known to the public as this one.

"It’s incredible to think about how many people needed to know about it to bring this movie to life — and yet we ended up not having any leaks in that regard.”